A Bahraini woman holds a cross marked picture of Formula One boss, Bernie Ecclestone, during a protest against the upcoming Bahrain Formula One Grand Prix which will take in Manama on April 21, in Sanabis, west of Manama, on April 16, 2013. A Bahraini youth opposition group said it blew up a car in Manama overnight in an incident the authorities blamed on a 'terrorist group' just days ahead of the country's Formula One Grand Prix. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

Policemen stand guard at a checkpoint outside the Formula One Bahrain International Circuit in, in Sakhir, Bahrain, Friday, April 19, 2013. Security remained tight amid expectations of fresh anti-government protests on the first practice race day of the Formula One Bahrain Grand Prix. The Bahrain Formula One Grand Prix will take place on Sunday. (Photo: AP)

Protest Against Formula One in Bahrain

Policemen stand guard at a checkpoint outside the Formula One Bahrain International Circuit in, in Sakhir, Bahrain, Friday, April 19, 2013. Security remained tight amid expectations of fresh anti-government protests on the first practice race day of the Formula One Bahrain Grand Prix. The Bahrain Formula One Grand Prix will take place on Sunday. (Photo: AP)

Protest Against Formula One in Bahrain

Policemen stand guard at a checkpoint outside the Formula One Bahrain International Circuit in, in Sakhir, Bahrain, Friday, April 19, 2013. Security remained tight amid expectations of fresh anti-government protests on the first practice race day of the Formula One Bahrain Grand Prix. The Bahrain Formula One Grand Prix will take place on Sunday. (Photo: AP)

Protest Against Formula One in Bahrain

Policemen patrol cars at a checkpoint outside the Formula One Bahrain International Circuit in, in Sakhir, Bahrain, Friday, April 19, 2013. Security remained tight amid expectations of fresh anti-government protests on the first practice race day of the Formula One Bahrain Grand Prix. The Bahrain Formula One Grand Prix will take place on Sunday. (Photo: AP)

Protest Against Formula One in Bahrain

Policemen patrol cars at a checkpoint outside the Formula One Bahrain International Circuit in, in Sakhir, Bahrain, Friday, April 19, 2013. Security remained tight amid expectations of fresh anti-government protests on the first practice race day of the Formula One Bahrain Grand Prix. The Bahrain Formula One Grand Prix will take place on Sunday. (Photo: AP)

Protest Against Formula One in Bahrain

An officer, right, instructs a security force officer on a road leading to the Bahrain International Circuit ahead of the Bahrain Formula One Grand Prix in Sakhir, Bahrain, Friday, April 19, 2013. Anti-government groups stepped up protests against the race in attempts to embarrass authorities, but the demonstrations have been mostly isolated to areas that are hotbeds of opposition to the ruling royal family. Rights groups also are using the race to criticize Bahrain's arrests and other security crackdowns. (Photo: AP)

Protest Against Formula One in Bahrain

Bahraini policemen talk near graffitis on the wall during clashes with demonstrators following a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

A Bahraini protester runs away carrying a pressurized fire extinguisher that is used to shot iron arrows towards riot police during clashes following a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

A Bahraini policeman walks amid smoke during clashes with demonstrators after a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

Bahraini policemen walk next to a fork lift vehicle that removes bricks placed on the road by anti-regime protesters during clashes after a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

A Bahraini Policeman extinguishes tyres burning during clashes with riot police following a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

A Bahraini Policeman extinguishes tyres burning during clashes with riot police following a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

A Bahraini Policeman walks past tyres burning during clashes between protesters and riot police following a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

Bahraini protesters prepare to throw stones towards riot police during clashes following a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

A Bahraini protestor holds a national flag wearing a mask used by the Anonymous movement during a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

Tyres placed on the road by anti-regime protestors are burning during clashes with riot police following a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

A Bahraini masked protestor stands during clashes with riot police following a protest against the arrival of Bahrain Formula One Grand Prix on April 18, 2013 in the village of Diraz, west of Manama. Bahrain riot police fired tear gas and stun grenades at protesters who hurled petrol bombs during protests against the staging of the race. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

A riot policeman jumps a fence to extinguish a tire fire set by Bahraini anti-government protesters in Sehla, Bahrain, on Thursday, April 18, 2013. Organizers of Bahrain's Formula One Grand Prix, to be held Sunday, said Thursday that sporadic protests against the race and violent unrest across the Gulf nation do not pose a threat to the premier international event in the kingdom. (Photo: AP)

Protest Against Formula One in Bahrain

Riot police officers stand near an anti-Formula One graffiti during an anti-government protest in the village of Diraz west of Manama, April 18, 2013, ahead of this weekend's F1 Grand Prix. (Photo: Reuters)

Protest Against Formula One in Bahrain

A female demonstrator carries pieces of wood to create a roadblock to stop riot police from entering the village during an anti-government protest in Diraz, west of Manama April 18, 2013, ahead of this weekend's Formula One Grand Prix. (Photo: Reuters)

Protest Against Formula One in Bahrain

A woman passes a wall covered in layers of anti-government graffiti while riot police pursue Bahraini anti-government protesters in the village of Diraz, Bahrain, on Thursday, April 18, 2013. Organizers of Bahrain's Formula One Grand Prix, to be held Sunday, said Thursday that sporadic protests against the race and violent unrest across the Gulf nation do not pose a threat to the premier international event in the kingdom. (Photo: AP)

Protest Against Formula One in Bahrain

A Bahraini youth fires a homemade weapon toward riot police, unseen, during clashes in the village of Diraz, Bahrain, on Thursday, April 18, 2013. Anti-government graffiti on the wall includes images of protesters from the village who died in earlier unrest. Organizers of Bahrain's Formula One Grand Prix, to be held Sunday, said Thursday that sporadic protests against the race and violent unrest across the Gulf nation do not pose a threat to the premier international event in the kingdom. (Photo: AP)

Protest Against Formula One in Bahrain

Bahraini anti-government protesters react to tear gas fired by riot police, unseen, during clashes in the village of Diraz, Bahrain, on Thursday, April 18, 2013. Organizers of Bahrain's Formula One Grand Prix, to be held Sunday, said Thursday that sporadic protests against the race and violent unrest across the Gulf nation do not pose a threat to the premier international event in the kingdom. (Photo: AP)

Protest Against Formula One in Bahrain

Bahraini youths watch for riot police between clashes in the village of Diraz, Bahrain, on Thursday, April 18, 2013. Organizers of Bahrain's Formula One Grand Prix, to be held Sunday, said Thursday that sporadic protests against the race and violent unrest across the Gulf nation do not pose a threat to the premier international event in the kingdom. (Photo: AP)

Protest Against Formula One in Bahrain

A riot policeman clears burning tires from a highway that were set ablaze by Bahraini anti-government protesters in Sehla, Bahrain, on Thursday, April 18, 2013. Organizers of Bahrain's Formula One Grand Prix, to be held Sunday, said Thursday that sporadic protests against the race and violent unrest across the Gulf nation do not pose a threat to the premier international event in the kingdom. (Photo: AP)

Protest Against Formula One in BahrainA Bahraini girl holds a cross marked picture of Formula One boss, Bernie Ecclestone, during a protest against the upcoming Bahrain Formula One Grand Prix which will take in Manama on April 21, in Sanabis, west of Manama, on April 16, 2013. A Bahraini youth opposition group said it blew up a car in Manama overnight in an incident the authorities blamed on a 'terrorist group' just days ahead of the country's Formula One Grand Prix. (Photo: AFP/Getty Images)

Protest Against Formula One in Bahrain

Policemen stand guard at a checkpoint outside the Formula One Bahrain International Circuit in, in Sakhir, Bahrain, Friday, April 19, 2013. Security remained tight amid expectations of fresh anti-government protests on the first practice race day of the Formula One Bahrain Grand Prix. The Bahrain Formula One Grand Prix will take place on Sunday. (Photo: AP)